"The problem is some fields are separated with one comma and some are by more than one"

The file will have to be consistent (i.e. the same number of columns, and thus unquoted-commas, in each row) for you to be able to import it. The sample four rows you have posted are fine in this regard - although there are multiple adjacent commas there are the same number in each row.

If you are not familiar with BCP you might prefer to try DTS - you can use the visual interface to preview the columns and see what translations are being performed etc., rather than doing it "blind" with BCP